Question

answer it with explaination
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Answer 1

21+23
21+23/4
44/4
11

Answer 2

$ANSWER$

we have to let one no 21 so other is 23

21+23=44 and 44 is divisible by 4

other examples

3+ 5 = 8 and 8 is divisible by 4.

5 + 7 = 12 and 12 is divisible by 4.

7+ 9 = 16 and 16 is divisible by 4.

9 + 11 = 20 and 20 is divisible by 4.